How ABB excites Hydro Tasmania power stations

2017-05-09
How it works

Excitation is the process by which a magnetic field is generated by means of an electric current. The excitation system provides a reliable supply of electricity, so that the field coils within a large generator can produce excitation (i.e. a magnetic field). The ABB SES works by regulating the terminal voltage and the reactive power flow of the synchronous machine by direct control of the field current, using thyristors converters. The excitation current goes to the generator rotor through brushes. The excitation current in this case comes directly from the excitation converter.

The ABB SES works by regulating the terminal voltage and the reactive power flow of the synchronous machine by direct control of the field current, using thyristors converters. The excitation current goes to the generator rotor through brushes. The excitation current in this case comes directly from the excitation converter.

Alternating current (AC) is created when a conductive material such as copper wire passes through a magnetic field. A rotor (i.e. part of the crank shaft) features copper coils wrapped around an iron core. When voltage passes through the rotor coils, it creates a magnetic field.

Long-standing relationship

Hydro Tasmania is the largest producer of renewable energy in Australia and runs its headquarters out of Hobart. The company operates multiple power stations across the state, where it uses a combination of water and wind power to harness natural energy. Owned by the Tasmanian Government, it has been operating in Australia for the past 100 years and employs around 1,100 people across its numerous operations, and has assets worth an impressive $5 billion.

Hydro Tasmania has huge infrastructure requirements in order to generate energy, and these systems rely on top-quality technology. The company’s assets are extremely important to the day-to-day storing and delivering of water to its turbines, and therefore must be maintained and refurbished on an ongoing basis. To ensure they remain fit-for-purpose, and able to deliver safe and reliable energy, Hydro Tasmania makes an ongoing investment in these assets.

Hydro Tasmania has a long-standing partnership with ABB, for the supply and maintenance of power and automation technology across its various operations. ABB has delivered a number of products for Hydro Tasmania’s numerous power stations over the years, including excitation systems, transformers and protection relays.

ABB’s Static Excitation Systems are installed to ensure the quality of generator voltage and reactive power across a number of hydro power stations in Tasmania.

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